diff --git a/plugins/GSdx/GSTextureCacheOGL.cpp b/plugins/GSdx/GSTextureCacheOGL.cpp
index 9f137e55e4..ee89c6966d 100644
--- a/plugins/GSdx/GSTextureCacheOGL.cpp
+++ b/plugins/GSdx/GSTextureCacheOGL.cpp
@@ -83,8 +83,9 @@ void GSTextureCacheOGL::Read(Target* t, const GSVector4i& r)
 	if(GSTexture* offscreen = m_renderer->m_dev->CopyOffscreen(t->m_texture, src, r.width(), r.height(), fmt, ps_shader))
 	{
 		GSTexture::GSMap m;
+		GSVector4i r_offscreen(0, 0, r.width(), r.height());
 
-		if(offscreen->Map(m))
+		if(offscreen->Map(m, &r_offscreen))
 		{
 			// TODO: block level write
 
diff --git a/plugins/GSdx/GSTextureOGL.cpp b/plugins/GSdx/GSTextureOGL.cpp
index a3db8b9a30..1ef622896e 100644
--- a/plugins/GSdx/GSTextureOGL.cpp
+++ b/plugins/GSdx/GSTextureOGL.cpp
@@ -396,6 +396,7 @@ bool GSTextureOGL::Map(GSMap& m, const GSVector4i* r)
 
 #if 0
 	// Maybe it is as good as the code below. I don't know
+	// With openGL 4.5 you can use glGetTextureSubImage
 
 	glGetTextureImage(m_texture_id, GL_TEX_LEVEL_0, m_int_format, m_int_type, 1024*1024*16, m_local_buffer);
 
@@ -406,7 +407,11 @@ bool GSTextureOGL::Map(GSMap& m, const GSVector4i* r)
 	glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture_id, 0);
 
 	glPixelStorei(GL_PACK_ALIGNMENT, m_int_alignment);
-	glReadPixels(0, 0, m_size.x, m_size.y, m_int_format, m_int_type, m_local_buffer);
+	if (r)
+		glReadPixels(r->x, r->y, r->width(), r->height(), m_int_format, m_int_type, m_local_buffer);
+	else
+		glReadPixels(0, 0, m_size.x, m_size.y, m_int_format, m_int_type, m_local_buffer);
+
 	glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
 
 #endif